from flask import Flask
from flask import request

app=Flask(__name__)

@app.route('/',methods=['GET','POST'])
def home():
	return '<h1>Home</h1>'

@app.route('/signin',methods=['GET'])
def signin_form():
	return '''<form action="/signin" method="post">
			  <p><input name="username"></p>
			  <p><input name="password" type="password"></p>
			  <p><button type="submit">Sign In</button></p>
			  </form>'''

@app.route('/signin',methods=['POST'])
def sigin():
	# 需要从request对象读取表单内容：
	if request.form['username']=='admin' and request.form['password']=='password':
		return '<h3>Hello,admin!</h3>'
	return '<h3>Bad username or password.</h3>'

if  __name__=='__main__':
	app.run()